You need to calculate your BMR, then eat 500 less calories than it takes to maintain your current weight (BMR). There are several ways to calculate BMR--google Harris-Benedict formula, that seems to be one that I see mentioned often.
If you eat 500 calores less than you burn each day, you will lose about 1 lb per week. Look on the forum at the nutrition stickies and check out LV's grocery list--you'll see some good suggestions for eating clean. Sounds like you are doing well with physical activity--tweak your diet a little and I bet you'll see the results you want.